from flask import render_template, session, request, jsonify, current_app, g

from info import constants
from info.models import User, News, Category
from info.utils.common import user_login_data
from info.utils.response_code import RET
from . import index_blu


@index_blu.route('/news_list')
def news_list():
    '''
    获取首页新闻数据
    :return:
    '''
    #1.获取参数
    # 新闻的分类id
    cid = request.args.get('cid','1')
    page = request.args.get('page','1')
    per_page = request.args.get('per_page','10')

    # 2.校验参数\
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg='参数')

    filters = [News.status == 0]
    if cid != 1: #查询的不是最新的数据
        # 需要添加条件
        filters.append(News.category_id == cid)

    # 3.查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return  jsonify(errno=RET.DBERR,errmsg='数据查询错误')
    # 取到当前页的数据
    news_model_list = paginate.items
    total_page = paginate.pages
    current_page = paginate.page

    news_list_li = []

    #将模型对象列表转成字典列表
    for news in news_model_list:
        news_list_li.append(news.to_basic_dict())

    data = {
        'total_page':total_page,
        'current_page':current_page,
        'news_dict_li':news_list_li
    }
    return jsonify(errno=RET.OK, errmsg='OK', data=data)


@index_blu.route('/')
@user_login_data
def index():
    '''
    显示首页
    1.如果用户已经登入，将当前登录用户的数据传到模板中，共模板显示
    :return:
    '''
    # 显示用户是否登入的逻辑
    # 取到用户id
    # user_id = session.get("user_id",None)
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)
    user = g.user
    #右侧新闻排行逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    #定义一个空的字典列表，里面装得就是字典
    news_dict_li = []
    #遍历对象列表，将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    #查询分类数据，通过模板的形式渲染出来
    categories= Category.query.all()
    category_li = []
    for category in categories:
        category_li.append(category.to_dict())

    data = {
        'user':user.to_dict() if user else None,
        'news_dict_li':news_dict_li
    }

    return render_template("news/index.html",data=data)

@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')